I really don't think That bit coin can help in all situation or crises, let's take for instance in a country where war and other conflict is currently going on do you really think that people will care more about their Bitcoins over their lives? I don't think so . In times like this, purchasing of items like food, water, and shelter won't really depend more on Bitcoin transactions. During such crisis, in a civilized country the government of such country's will see to it that it's people are well treated and provided for. They will have nothing to think of more or less Bitcoins. Although on the positive side, such held Bitcoins can come in handy after crisis, it can be a fresh start for those who lost everything. It can act as a purchasing power, a new beginning